79 



warmer nights and cooler days than August 1865 had. The minimum was 

 31 on the 1st and 18th; last year's was 32. . 



Daily-range of Temperature had the mean of 18-55 degrees whichis 

 -1- 2-16 above the 20 years' mean, but -2*35 less than 1865 had.^ The 

 greatest range on any day was 31 degrees on the 18th (the most fatal in the 

 month), while last year's was only 28. 



Solar-Intensitij mean, 83-70 degrees, is -h 1-92 above the average of the 

 previous 10 years, though -1-38 less than 1865 had. The maximum was 

 99 degrees on the 26th, the minimum 55 on the 2nd. Last year's extremes 

 were 98 and 58. 



Terrestrial-Radiation mean, 38-18 degrees, was H-2-38 above the average 

 of the previous ten years, and -t- 2-33 more than 1865 had. The extrCTaes 

 were maximimi 46-5 on the 26th, and minimum 28 on the 18th. Last 

 year's extremes were 43-5 and 27*5. 



Rain feU on 12 days, which is -1-45 below the 11 years' average of wet 

 days for August. The total deposit gauged was only -93 of an inch bemg 

 -1-13 below the 20 years' mean, and --30 of an inch less than August 

 1865 had. On the 10th -34 of an inch fell, and on the 12th -30 ; on these 

 two days only was there sufficient rain to cleanse surface drams. No Snow 

 fell in the city this month, but it did so frequently on Mount Wellmgton, 

 which was never free from snow during the whole month. 



Humidity mean, 73, is -6^ below the 20 years average, and 3 less than 

 1865 had. 



Elastic-force of vapour had a mean of 267, which is - 10 less than the 

 20 years' average. The range was from minimum 156 on the 18th, to 

 maximum 375 on the 30th. ' ,. 



Spontaneous Evaporation was 3-00 inches, therefore greatly exceedmg 

 rainfall. Last year's was not so much by close upon half an inch. 



Cloud mean, 6-24, is -i- -65 more than the 20 years' average, and about 

 the same above last year. 



Ozone mean, 7-79, was -I- '29 above the August mean of the previous 9 

 vears, and a trifle more than 1865 had. It ranged from the mmunmn 5 

 frequently, to maximum 10 (saturation) on the 12th. So much atmospheric 

 purity, with almost constant wind movement, genial temperature, and 

 abundance of positive electricity, no doubt contributed largely to the very 

 healthy character of this month. . r. r c 



Electricity had 37 positive indications, with a maximum tension ot D-D, 

 and minimum of 2. Negative was registered 22 times, with extreme 

 tension of 5-5 and 1. " Nil" was only recorded three times— on the nm 

 and second days of the month. August, 1865, had 38 positive and 24 

 negative records. „ . , « 



33 deaths for this month is —14 8-9 less than the average for August ot 

 the previous nine years, and seven less than the previous minimum {W) 

 in August, 1860. Last year had nine more deaths than the present 

 month. 



year 



